/* ===== CSS VARIABLES ===== */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f5f5f7;
            --text-primary: #1d1d1f;
            --text-secondary: #6e6e73;
            --accent: #0071e3;
            --accent-hover: #0077ed;
            --border: #d2d2d7;
            --shadow: rgba(0, 0, 0, 0.1);
            --card-bg: #ffffff;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        [data-theme="dark"] {
            --bg-primary: #000000;
            --bg-secondary: #1d1d1f;
            --text-primary: #f5f5f7;
            --text-secondary: #a1a1a6;
            --accent: #2997ff;
            --accent-hover: #3fa3ff;
            --border: #424245;
            --shadow: rgba(255, 255, 255, 0.1);
            --card-bg: #1d1d1f;
        }

        /* ===== GLOBAL STYLES ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            transition: var(--transition);
            overflow-x: hidden;
            user-select: none;
        }

        ::selection {
            background-color: var(--accent);
            color: white;
        }

        /* ===== NAVBAR ===== */
        .navbar {
            background-color: var(--bg-primary);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: var(--transition);
        }

        .navbar-brand {
            font-weight: 600;
            font-size: 1.25rem;
            color: var(--text-primary);
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--accent);
        }

        .theme-toggle {
            background: none;
            border: 1px solid var(--border);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .theme-toggle:hover {
            background-color: var(--bg-secondary);
            transform: scale(1.05);
        }

        [data-theme="dark"] .navbar-brand:hover {
            color: var(--accent);
        }

        [data-theme="dark"] .navbar-toggler-icon {
            filter: invert(1);
        }

        /* ===== HERO SECTION ===== */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding: 50px 0 50px;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
        }

        .profile-photo {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid var(--accent);
            box-shadow: 0 20px 60px var(--shadow);
            margin-bottom: 2rem;
            transition: var(--transition);
        }

        .profile-photo:hover {
            transform: scale(1.05);
            box-shadow: 0 25px 80px var(--shadow);
        }

        .hero h1 {
            font-size: clamp(2.5rem, 8vw, 5rem);
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero .subtitle {
            font-size: clamp(1.25rem, 3vw, 2rem);
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .hero .tagline {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 2.5rem;
        }

        .btn-primary-custom {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 14px 32px;
            border-radius: 980px;
            font-size: 1rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary-custom:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px var(--shadow);
        }

        .btn-secondary-custom {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
            padding: 14px 32px;
            border-radius: 980px;
            font-size: 1rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

        .btn-secondary-custom:hover {
            background-color: var(--bg-secondary);
            transform: translateY(-2px);
        }

        /* ===== SECTION STYLES ===== */
        section {
            padding: 100px 0;
        }

        .section-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 700;
            margin-bottom: 1rem;
            text-align: center;
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 4rem;
        }

        /* ===== ABOUT SECTION ===== */
        .about-content {
            max-width: 800px;
            margin: 0 auto;
            font-size: 1.125rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        /* ===== SKILLS SECTION ===== */
        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .skill-category {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 2rem;
            transition: var(--transition);
        }

        .skill-category:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px var(--shadow);
        }

        .skill-category h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--accent);
        }

        .skill-item {
            display: inline-block;
            background-color: var(--bg-secondary);
            padding: 8px 16px;
            border-radius: 20px;
            margin: 0.5rem 0.5rem 0.5rem 0;
            font-size: 0.875rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .skill-item:hover {
            background-color: var(--accent);
            color: white;
            transform: scale(1.05);
        }

        /* ===== PROJECTS SECTION ===== */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .project-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
        }

        .project-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 25px 50px var(--shadow);
        }

        .project-content {
            padding: 2rem;
        }

        .project-card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .project-card p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            min-height: 60px;
        }

        .tech-stack {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }

        .tech-badge {
            background-color: var(--accent);
            color: white;
            padding: 6px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 500;
        }

        .project-link {
            color: var(--accent);
            text-decoration: none;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }

        .project-link:hover {
            gap: 0.75rem;
        }

        /* ===== EXPERIENCE SECTION ===== */
        .experience-timeline {
            max-width: 900px;
            margin: 3rem auto 0;
            position: relative;
        }

        .experience-timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent) 0%, var(--border) 100%);
        }

        .experience-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 2rem;
            margin-bottom: 2rem;
            position: relative;
            transition: var(--transition);
        }

        .experience-item:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 30px var(--shadow);
        }

        .experience-item h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .experience-item .company {
            color: var(--accent);
            font-weight: 500;
            font-size: 1.125rem;
            margin-bottom: 0.5rem;
        }

        .experience-item .duration {
            color: var(--text-secondary);
            font-size: 0.875rem;
            margin-bottom: 1rem;
        }

        .experience-item p {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== EDUCATION SECTION ===== */
        .education-container {
            max-width: 700px;
            margin: 3rem auto 0;
        }

        .education-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }

        .education-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px var(--shadow);
        }

        .education-item h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .education-item .institution {
            color: var(--accent);
            font-weight: 500;
            font-size: 1.125rem;
            margin-bottom: 0.25rem;
        }

        .education-item .year {
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        /* ===== CERTIFICATIONS SECTION ===== */
        .certification-container {
            max-width: 700px;
            margin: 3rem auto 0;
        }

        .certification-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }

        .certification-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px var(--shadow);
        }

        .certification-item h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .certification-item .institution {
            color: var(--accent);
            font-weight: 500;
            font-size: 1.125rem;
            margin-bottom: 0.25rem;
        }

        .certification-item .year {
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        /* ===== CONTACT SECTION ===== */
        .contact-form {
            max-width: 600px;
            margin: 3rem auto 0;
            background-color: var(--card-bg); /* Use card background for consistency */
            padding: 2rem; /* Add padding inside the container */
            border-radius: 18px; /* Rounded corners for the container */
            border: 1px solid var(--border); /* Subtle border */
            box-shadow: 0 10px 25px var(--shadow); /* Soft shadow */
            transition: var(--transition); /* Smooth transition for dark mode etc. */
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            font-weight: 500;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .form-control {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid var(--border);
            border-radius: 12px;
            background-color: var(--card-bg);
            color: var(--text-primary);
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(41, 151, 255, 0.1);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 150px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 16px;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-submit:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px var(--shadow);
        }

        .btn-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .form-message {
            margin-top: 1rem;
            padding: 1rem;
            border-radius: 12px;
            text-align: center;
            font-weight: 500;
            opacity: 0;
            transform: translateY(-10px);
            transition: var(--transition);
        }

        .form-message.show {
            opacity: 1;
            transform: translateY(0);
        }

        .form-message.success {
            background-color: #d1f4e0;
            color: #0d6832;
        }

        .form-message.error {
            background-color: #fce8e8;
            color: #c41e3a;
        }

        [data-theme="dark"] .form-message.success {
            background-color: #0d6832;
            color: #d1f4e0;
        }

        [data-theme="dark"] .form-message.error {
            background-color: #c41e3a;
            color: #fce8e8;
        }

        /* ===== FOOTER ===== */
        footer {
            background-color: var(--bg-secondary);
            padding: 3rem 0 2rem;
            border-top: 1px solid var(--border);
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .social-link {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .social-link:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }

        .copyright {
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        /* ===== ANIMATIONS ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 768px) {
            .hero {
                padding: 0px 0 0px;
                min-height: 90vh;
                align-items: center;
                display: flex;
            }

            section {
                padding: 60px 0;
            }

            .skills-grid, .projects-grid {
                grid-template-columns: 1fr;
            }

            .experience-timeline::before {
                left: 0;
            }

            .nav-link {
                padding: 0.5rem 0;
            }

            .btn-primary-custom, .btn-secondary-custom {
                padding: 12px 24px;
                font-size: 0.875rem;
            }

            .about-content {
                background-color: var(--card-bg); /* Use card background */
                padding: 2rem; /* Add padding */
                border-radius: 18px; /* Rounded corners */
                border: 1px solid var(--border); /* Subtle border */
                box-shadow: 0 10px 25px var(--shadow); /* Soft shadow */
                margin-top: 2rem; /* Add some space above */
            }
        }

        /* ===== ACCESSIBILITY ===== */
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* Focus styles for keyboard navigation - Adjusted to remove outline on link click */
        a:focus, a:active {
            outline: none; /* Removes outline for clicked links */
        }

        button:focus, input:focus, textarea:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .navbar-toggler:focus,
        .navbar-toggler:active {
            outline: none !important;
            box-shadow: none !important;
        }